Hi bogdanfirst,
I try to write my posts with short sentences.
There are two reasons.
Sometimes people reading have little English.
Also i have a 14 inch monitor,
i believe the most common worldwide,
i use it at 640 x 480
again i think the most common worldwide.
Longer sentences mean panning left and right.(on a small screen)
You say its like poems...
I will take that as a compliment, thank you.
For that previous post the lines were set out
in that way, because it was a set of directions.
Each line being the next.
When writing directions it is very easy to confuse
somebody who is not familiar with a system,
so i set it out like that.
Sometimes i re-write several times,
so i know the meaning is clear.
And i still get it wrong sometimes.
POWER-U:
Glad to see you got it posted ok.
i hope my poem helped.
I'm still not too happy with this circuit yet.
I'm thinking it over.
You say you want an output of 'around 12 volts'
Well this LOOKS like someone has tried to do a circuit thats
a very tightly regulated supply, but it doesn't look right.
Having a reference voltage on the 108 base,
doesn't look to me like it would regulate the BFY51.
Do you want a regulated supply?
Or do you want 'around 12 volts'
The variable 1k would vary the output,
but it doesn't look like a very good way.
If its a regulated supply that you want to build yourself,
then the bridge rectifier looks right, the 3300 cap is ok,
the BFY51 is a medium power transistor, max 1 amp, 30 to
40 volt working, gain about 25 to 30.
A poor choice for a supply regulator.
I would recommend a 3055, or similar.
Maybe this is for a special job....
Why is the 89 ohm in there?
if its to sense current then the 1k might be for that?
Can you get different components?
Could you explain what you want from this?
Regards, John